Stoker mechanism.



PJ L. CROWE.

y STOKER MEGHANISM. APPLIGATION FILED PBB.28,1908.

4 Patented Aug. 15, 41911.

'SSHEBTS-SHEBT l.

i @2RM/614000.00

P. L. CROWE.

STOKER MEGHANISM.

APPLICATIONa FILED 1113.28, 190s.

APatented Aug. 15, 1911.

3 SHEETS-SHEET 2.

P. L. GROWE.

STOKER MBGHANISM.

APPLIUATION FILED FEB.28,1908. 1,0009586, Patented Aug. 15, 1911.

3 SHEETS-SHEET 3.

351.11 /144 @Mouw/1j. 5M..

`PAUL L. CROWE, OF JERSEY CITY, NEW JERSEY:

STOKER MECHANISM.

Specification of Lettersl Patent.

- Patented Aug. 15, 1911-.

Application led February 28, 1908. Serial No. 418,229.

ToI all whom 'it may concern:

Jersey City, in the county of 4Hudson and State of New Jersey, have invented certain new and useful Improvements in Stoker Mechanisms, of which the following is a specification.

My invention relatesto mechanical stoker's and .the object is, to provide same with new and useful improvements connected with the .traveling grate, and I disclaim any features which are allowable inhmy application No. 416,965 filed Feb. 2l, 1908.

'- Referring tothe' drawings Figure lis -an elevation of the furnace partly in section embodying my invention: Fig. 2 is a plan view partly in section. Fig. 3 is an enlarged cross section of the furnace showing a vgrate bar having a convex fuel supporting surface and a concave roller. Fig..4 is across section ofpa furnace provided with a single chain grate, taken on line y y, Fig. 1, looking in the direction of arrow, farther tothe rear from said line, and intended tol only show the dump plate operating means, which being applicable to either a single o r duplex furnaccgtherefore only the singlechain grate was shown. Fig. 5 is a cross section of the bevel gratebar. Fig. 6 is aside view of a modified form of grate bar having a curved supporting surface. Fig. 7, is a side view 'of a concave roller, Fig. 8 is a cross section of the modified form of grate'bar.

2 is the furnace, 3 the bridge wall and 4 the boiler.

5 are channel irons supported within the furnace at their. front ends, by angle irons 6 and at 'their rear ends by .standards 7, resting on the furnace floor. 8 are angle irons placed within the furnacevbelow the channel' irons and supported by irons 9 and standards 7, as shown. These.

irons 5 and 8 are situated on an ingle within the furnace and lare held .together by suitable means. VThe flanges 10, of said channel and angle irons faceinward.

12 are cross rods mounted on the channel irons having flanged wheels, 13, revolving upon them...

The shaft 11,-is supported by the standard 7. The concave rollers 14 are supported by angle irons, 8. The sprocket wheel shaft 15 is supported in the adjustable bearing, 16, which slidey in apertures 17 formed between -19-20. This facilitates on the -front of the furnace. Each bearing has sliding grooves or ways which facilitate the easy movement of the bearin s.

The hopper end plates are dgivided at removing and posit1oning of the shaft. y

' 21 are sliding shutters resting on studs .22 on hoppersaidshutters close the opening at the front side of the bearings. The studs have nuts to hold shutters against plates. y

24 are wedges for adjusting the bearings, l placed between angle iron 26 and bearings.

The .inclined edge portion of the wedges rest 1n grooves cut in the inclined end portions o-f the bearings. The wedges are held 1n place by suitable studded nuts.

. 37 is the endlesschain grate comprising a plurality of grate bars 3-8 and chain links to wlnch a bar is attached. 1 This endless chain lgrate travels over suitable sprocket wheels mounted on the shaft 15 and the groofe wheels on shaft 11. Each grate bar isformed with a longitudinal beveled conveX surface (see Fig, 3) or with a convex curved surface (see Fig. 6). In cross section each grate bar is` formed with a beveled surface A(see Fig. 5), or curved surface (see Fig. 8). These cross section shapes permit the bars to'pass under lap bars 40 and also allow4 the ashes to collect over grate bar housingand hopper end plate 18, mounted l Be'it known that I, PAUL L. CRoWE, c1t1- lzen of the United States, and resident of fingers for protecting same. The object of constructing. the grate bars 'longitudinally as described, is to have them' act on the lap bars so as to moreefectually'consume the fuel that has hitherto escaped combustion. It also tends to keep the bars cooler.` Then again when the bars are formed with central raised portions (longitudinally) the fuel will be less in thickness 'at t-he central por tion of the furnace, which reduction tends to compensate for increase of the combustion along the side walls, thus allowing of furnace. 1 ,y

The dump plate 44 at the rear of furnce even combustion of the fuel across the reltrff is pivoted on irons 5, by the extension of he venlarged portion 45, secured o n said iron 5,1l

The plate 44 restsv by the end lap bars. against the frame 46, secured to channel irons 5, mounted on` bridge wall, 3. Th

dump plate is operated by the divided lever 47, bot-h ends supported by angle irons 8.

Portion 48 of the lever supports the roller 110 14. The halves of the lever are bent and joined at the center of the furnace where they are connected byv collar 50 with bolt 51. 52 is an arm connecting leverwith dump s plate.

The extension 54 of portionl 4:8 passes through the wall 55, where it is provided with a weighted'arni.

What I claim'is: y

l. 'An endless chain grate comprising a grate frame, a 'series of traveling grate bars mounted to move in said frame, the bai's arranged withtheir longitudinal axes transverse to the path of movement ofthe said 'bars and formed with fuel supporting surfaces which slope gradually upward from the ends of the bars to a point intermediate the ends, and a plurality of rollers, arranged l substantially parallel 4to the traveling bars,

said rollers having a concave supporting surface coinpleniei'itary to' the fuel supporting surface of the grate bars adapted to coper-A atewith said inclined surfaces of the grate ybars yat the lower grate run.

2. An endless chain grate, comprising a grate frame, a series of traveling grate bars,

mounted to move in said frame, means for uniting the grate bars, the grate bars being y arranged with their longitudinal axes transverse to the path of movement of said bars and formed with a fuel supporting surface which slopes gradually upward from the ends of the bars to a ypoint intermediate the ends and a plurality of rollers arranged substantially parallel to the traveling bars, said rollers having a concave supporting surface complementary to the fuel supporting surface of the grate bars, adapted to coperate with said inclined surface to support the 4 bars aty the lower grate run.

3. An endless chain grate consisting of a grat-e frame, a series of traveling grate bars mounted to move in said frame. means for uniting the grate bars, the .said bars being arranged with their longitudinal axes trans'- verse to the path of movement of said bars l and eaclr of said bars formed with a fuel supporting surface which slopes upwardly from the ends of the bar to a point interinethe fuel supporting surface of the grate bars at the lower grate run.

4.' An endless chain grate consisting of a grate frame, a series of traveling grate barsmounted to move in said frame, means for uniting the grate bars, said grate bars being arranged with their longitudinal axes transverse to the path of movement of said bars and formed with a fuel supporting surface which slopes gradually upward from theI ends of the bars to a point intermediate the ends, said bars also formed with a supporting surface which in cross section is' higher at the central portionthan at the sides, saidk i crosswise slope being on an arch line, a plurality of rollers'arranged Vsubstantially parallel to the traveling bars, said rollers having a concave supporting surface complementaiy to the fuel supporting surface of the grate bars, adapted to coperate with the said surfaces of the grate bars at the lower grate run.

Signed at Jersey City in the county of Hudson and State of New Jerseythis 25th day of ,February A. D. 1908.

' l i PAUL L; GROWE.

Witnesses:

JOHN HART, Y JOHN MCKERNAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Jiateni-:s-l Washington, D. C. 

